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(ModeL) s Sheets-Sheet 1. J. MATHISEN.

DOOR LOOK. No. 278,719,. Patented June 5,1883.

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(ModeL) J. MATH/ISBN. DOOR LOGK.

Patented June 5, 1888.

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J. MATHISEN.

DOOR LOOK.

Patented June 5,1883.

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of a portion of a lock, taken on the line C D NITED STATES PATENTOFFICE.

J OHAN MATHISEN, OF OHRISTIANIA, NORWAY.

DOOR- LOCK.

SPECIFICATION forming part of Letters Patent No. 278,719, dated June 5,1883.

Application filed October 9, 1882. (Model) Patented in Belgium November15, 1881, No. 56,159; in Norway November 22, 1881 in France December 17,1881, No. 145,722; in England April 3, 1882, No. 1,607; in PortugalAugust 22, 1882, No. 769, and in Italy September 30, 1882, No. 14,424.

To all whom it may concern:

Be it known that I, J OHAN IVIATHISEN, of Ohristiania, in the Kingdom ofNorway, have invented certain new and useful Improvements in Locks; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form part of this specification.

My invention relates to an improvement in combined door lock and latch,the object of the same being to provide a device of this charac terwhich will combine simplicity, economy, and neatness in constructionwith durability and efficiency in use; and with these ends in view myinvention consists in certain details in construction and combinationsof parts, as will be more fully described, and pointed out in theclaims. I

In the accompanying drawings, Figure 1 is a perspective view of a doorwith my look socured thereto. Fig. 2 tional view of the hand-knob. Fig.3 is a sectional view of the lock, taken on the line A B of Fig. 4. Fig.4 is a view of the lock with its Fig. 5 is a sectional view of Fig. 4.Fig. dis a view of the lock-strike as seen when attached to thedoor-jamb, and Fig. 6" is a side elevation of the same. Fig. 7 is a topor plan view of the lock, showing the lock-strike in section. Figs. 8 to12 show a modified form of lock.

This improved look, as shown in the drawings, is constructed andarranged to be secured to the outer face of a door opening inward but byslightly changing the same it can be adapted to doors opening outward.The outer face of the door is cut away or recessed for the reception ofthe lock-case, and is also provided with openings through the same forthe passage. of

the knob-shaft a and keyguide h. The escutcheon a is then placed inposition on the inner face of the door, and the said lock and escutcheonare secured thereto by the single screw m, which latter first passesthrough the escutcheon, through the section of the door between theescutcheon and the lock, and finally into the female screw-threadedsocket m of the faceis a longitudinal secplate of the lock. Thus it willbe seen that while the face-plate of the lock is exposed to view thescrew for holding it in position is on the opposite side of the door,which precludes the possibility of removing the look from the outside ofthe door for the purpose of obtaining ingress.

The bolt-arm a is rigidly secured to or formed integral with the knob-shaft a, and moves against and is supported and held in positionbetween the inwardly-proj ecting supports aa of both lock-plates. Bythis means all longitudinal movement of the knob-shaft is effectuallystopped, and all loose playing of the same through wear almostabsolutely prevented.

To the inwardly-projecting stops a and a of the face and inner plates,respectively, the hollow tubes 1) are rigidlysecured. These tubes 1)form bearings for the knob-shaft through its entire length. They alsoprotect or cover the knob-shaft and take all the wear therefrom, and, asa consequence, protect the other parts, which would be otherwise exposedto wear from the constant turning of the shaft. This construction alsoenables the knobs to be situated farther away from the door than theyordinarily are, without requiring a proportionate increase in thestrength of the door, as the knob-shaft does not bear against the door,and consequently does not depend thereon for its solidity and firmness,as is the case with mo.r rise-locks.

The knobs d are 'made of any suitable material, and each is providedwith a socket or re cess, into which the ends of the knob-shaft a areinserted and secured by the conical screw pins or bolts 0. Should theknob by constant usage become worn, it is obvious that, owing to theconical or tapering form of the screw pins or bolts 0, they can bescrewed home as the parts wear away, and thereby again tighten theattachment.

In order to give the exposed parts of the look a uniform and finishedappearance, the tubular bearing 6 on the outside of the lock is coveredby the tapering shell k, the large end of which bears against theface-plate of the look while its small end abuts against the knob. Thisshell, being exposed to no strain or wear, can be constructed from anysuitable IOO light material, and need not be rigidly secured inposition.

f is the combined latch and bolt, recessed on its outer face for thereception of the springrod e and the link 6. This link is loosely placedagainst the bolt f, and is provided with the two'inwardlyextendingknife-edge lugs e e, which latter rest on opposite sides of the stud orpartition 6 of the lock-bolt f. A spring is coiled around the spring-rodand bears at one end against the lateral projection e of the link 6, towhich the said rod 6 is rigidly secured, while the opposite end of thesaid spring bears against the lock-easing. The springrod c passesthrough the lock-casing, and, as a consequence, is free to be movedlongitudinally, while at the same time it is guided and held in positionthereby.

The bolt f is provided with a spring-rod, c, rigidly secured thereto atone end, and situated directly behind the spring-rod 6, and the springthereon constantly tends to force the bolt f outward, so that theprojection or partition 6 thereof will bear against the lug e' of thelink 6. The side of the bolt nearest the shaft to is provided with anoblong slot, through which the bolt-arm a passes to engage the lug c ofthe link (2. Thus it will be seen that when either knob is turned thearm a bears against the lug c and moves the link 0, which latter inturn, by means of the lug 6" bearing against the partition 0, moves thebolt inward. As soon as the pressure on the knob is released thepressure of the spring around the rod 6 causes the link 6 to resume itsnormal position, while the spring around the rod 6 forces the bolt outsimultaneously therewith. By this construction considerable wear on thebolt is prevented, and it is left free to move inward and outward whileclosing the door without moving the knobs. The two plates 9 g, whichcompose the lock-case, are held together by the screw 1', which latterpasses through the plate g and enters the female screw-threaded socket iin the plate 9.

To assist in holding the lock in position on a door, wedge-shaped ribs 1are formed integral with portion of the lock-casing. These ribs areembedded in the door and most effectually prevent any displacement ofthe lock in case the screw m should work loose or become displaced.

Two different methods are employed for locking the bolt 6, either orboth of which can be employed 011 the same lock or used singly, asdesired. One of these improvements con sists in the introduction intothe chamber of the look, but forming a separate part and secured theretobyone screw, of the key-housing h, key-guards h, and the plate 7L5, allbeing cast integral. 71 is the bolt or dog operated by the key, andadapted to move so that the end thereof will enter an open slot in theside of the latch f and hold the same in a locked position, so that itcannot be moved by the knobs. This auxiliary locking mechanism can atoption be more or less complicated, and can be manufactured independentof the main lock, and it can be removed for repairs or replaced atpleasure without affecting or changing the main lock.

The second arrangement for locking the latch consists of a pin commonlyattached by means of a chain or equivalent to the lock-case, and adaptedto be passed through an opening in the tubular bearing 1) into theopening 0 of the shaft to and prevent the said shaft from being turned.

v The adjustable lock-strike shown in Figs. 5 and 6 is adapted to besecured to the doorframe with the outer edge thereof even with the outeredge of said frame, while the rear or bearing edge thereof fits to thebolt irrespect ive of the thickness of the door-latch or lockcase. Thislock-strike is composed of the parts 1) p, the enter one, 1), of whichis so attached that its edge 19 rests flush with the outer edge of thedoor-frame, while the inner piece, 1), is moved inward, as shown in Fig.6, so that the bolt f rests against its bearing-face when the door is ina closed position.

The piece 1; is provided with screw-holes for the passage of screws, bywhich it is secured in position, while the inner piece, 1), is adaptedto slide under the outer piece, and is provided with oblong slots,through which screws pass. Before the lock-strike is firmly secured tothe door-frame, the piece 12 is first adjusted so that the bolt or latchf will bear against the same without allowing the door any movement orplay when in a closed position. The screws are then driven home, and thepart 1) is held in prop er position by frictional contact between thepart 1) and the door-frame.

The modification represented in Figs. 8 to 12 shows another style oflock, in which the latch is adapted to move vertically instead ofhorizontally, as in the previous construction. The construction andformation of the main parts of this modified form of lock operate likethe first construction, are lettered the same, and hence need not beagain described. By this latter construction the width of.the lock isgreatly decreased, thereby enabling the application of the lock to doorswith very narrow side pieces. The strike-plate shown in Fig. 12 and 12is somewhat difi'erently formed, but is adjusted and acts precisely likethe one before described.

It is evident that slight changes in the construction and relativearrangement of the se Y4 eral parts might be resorted to withoutdeparting from the spirit of my invention; and hence I would have itunderstood that I do not limit myself to the exact construction shownand described, but consider myself at liberty to make such changes andalterations as come within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination, with a lock-case having inward projections, a and a,and tubular bearings secured to the opposite'sides thereof,

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of a knob-shaft resting and adapted to turn in said tubular bearings,and a-bolt-arm :playing between said projections, substantially as setforth.

2. The combination, with the knob-shaft, of the handles or knobssituated at right angles to the knob-shaft, and provided with sockets toreceive the ends of the latter, and the conical screws passinglongitudinally through said handles and through the ends of said shafts,substantially as set forth.

3. The combination, with the knob-shaft and bolt-arm, of the latch orbolt f, provided with the lug 6 the link 6, provided with lugs e e, andspring-rods 8* c, with their springs, all of the above parts combinedand adapted to operate as described.

4. The combination, with the knob-shaft or boltar1n, of the bolt orlatch provided with an oblong slot to receive the end of the bolt-arm,

and the link 0, adapted to be engaged by said arm, substantially as setforth.

5. The combination,-with the bolt f, link 6,

arm a, and-shaft a,.:of -the housing h, plate 715,

and -dog -.h 'sall combined and' adapted to operate substantially assetforth.

6. The combination, with a lock, of a lockstrike consisting of an innerand an outer piece, the former beingadapted to slide under the latter toadjust the strike to accommodate it to the latch or bolt.

7. In a lock-strike, the combination, with the part 10, provided withscrew-holes, of the adjustable part 10, provided with oblong openingsfor the passage of the fastening-screws, the said part p being adaptedto slideunder the part 12, and both constructed, combined, and adaptedto operate substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this8th day of June, 1882.

' JOH. MATHISEN. \Vitnesses:

GHR. S. MA UIs, S. BERNHD. ASUR.

